PREPARING ALKALI METAL HYDROXIDE BY WATER SPLITTING AND HYDROLYSIS

摘要

A two-compartment water splitter having alternating cation and bipolar membranes is used to remove alkali metal cations from an aqueous alkali metal chloride solution so as to produce an acidified salt solution. The coproduct is a base such as NaOH or KOH. The acidified salt solution may then be fed to a membrane or diaphragm electrolytic cell for production of chlorine and alkali metal hydroxide.